Ok, I bought this computer with ME on it, about 3 weeks ago I put on XP Pro, about 2 days ago my Boston Acoustic Speakers (BA7500) Surround speakers are not giving sound. When they are on and I turn up the volume, a weird popping noise comes out of the surround speakers. I have reinstalled my drivers twice, when I do the speakers work for a little bit, then stop. What is my problem? What can I do? Thanks!!